There are no bookshelf speakers on earth that can go to 20HZ in fact many extremely expensive speakers can't do it.
You will not need a subwoofer for a 14 foot square room. The small size and square shape will leed to severe standing waves and bass bloat.
If possible try to find a narrow floorstanding speaker system.
Resolution is the key to low volume. Resolution is dependent on the electronics. Try to find tube electronics which excel at low volumes.
Look at Dali loudspeakers which offer exceptional transparency and yet are warm and full bodied.
You will not need a subwoofer for a 14 foot square room. The small size and square shape will leed to severe standing waves and bass bloat.
If possible try to find a narrow floorstanding speaker system.
Resolution is the key to low volume. Resolution is dependent on the electronics. Try to find tube electronics which excel at low volumes.
Look at Dali loudspeakers which offer exceptional transparency and yet are warm and full bodied.